'\" te
.\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
.\" When distributing Covered Code, include this CDDL HEADER in each file and include the License file at usr/src/OPENSOLARIS.LICENSE.  If applicable, add the following below this CDDL HEADER, with the fields enclosed by brackets "[]" replaced with your own identifying information: Portions Copyright [yyyy] [name of copyright owner]
.TH DNSSERVICEREGISTER 3DNS_SD "Aug 20, 2007"
.SH NAME
DNSServiceRegister \- register service with DNS
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [ \fIflag\fR ... ] \fIfile\fR ... \fB-ldns_sd\fR [ \fIlibrary\fR ... ]
#include <dns_sd.h>

\fBDNSServiceErrorType\fR \fIDNSServiceRegister\fR(\fBDNSServiceRef\fR *\fIsdRef\fR,
     \fBDNSServiceFlags\fR \fIflags\fR, \fBuint32_t\fR \fIinterfaceIndex\fR,
     \fBconst char\fR *\fIname\fR, \fBconst char\fR *\fIregtype\fR,
     \fBconst char\fR *\fIdomain\fR, \fBconst char\fR *\fIhost\fR,
     \fBuint16_t\fR \fIport\fR, \fBuint16_t\fR *\fItxtLen\fR, \fBconst void\fR *\fItxtRecord\fR
     \fBDNSServiceServiceRegisterReply\fR \fIcallBack\fR
     \fBvoid\fR *\fIcontext\fR);
.fi

.LP
.nf
\fBtypedef\fR \fIvoid\fR(*\fBDNSServiceRegisterReply\fR)(\fBDNSServiceRef\fR \fIsdRef\fR,
     \fBDNSServiceFlags\fR \fIflags\fR, \fBDNSServiceErrorType\fR \fIerrorCode\fR,
     \fBconst char\fR *\fIname\fR, \fBconst char\fR *\fIregtype\fR,
     \fBconst char\fR *\fIdomain\fR, \fBvoid\fR *\fIcontext\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBDNSServiceRegister\fR function is used by clients to advertise a service
that uses \fBDNS\fR. The service is registered with multicast \fBDNS\fR if the
domain name is \fB\&.local\fR or the interface requested is local only.
Otherwise, the service registration is attempted with the unicast \fBDNS\fR
server. The callback argument should point to a function of type
\fBDNSServiceRegisterReply\fR listed above.
.sp
.LP
The \fIsdRef\fR parameter points to an uninitialized \fBDNSServiceRef\fR
instance. If the \fBDNSServiceRegister()\fR call succeeds, \fIsdRef\fR is
initialized and \fBkDNSServiceErr_NoError\fR is returned. The service
registration remains active until the client terminates the registration by
passing the initialized \fIsdRef\fR to \fBDNSServiceRefDeallocate()\fR. The
\fIinterfaceIndex\fR when non-zero specifies the interface on which the service
should be registered. Most applications pass \fB0\fR to register the service on
all interfaces. See the section "Constants for specifying an interface index"
in \fB<dns_sd.h>\fR for more details. The \fIflags\fR parameter determines the
renaming behavior on a service name conflict. Most applications pass \fB0\fR to
allow auto-rename of the service name in case of a name conflict. Applications
can pass the flag \fBkDNSServiceFlagsNoAutoRename\fR defined in
\fB<dns_sd.h>\fR to disable auto-rename.
.sp
.LP
The \fIregtype\fR indicates the service type followed by the protocol,
separated by a dot, for example "\fB_ftp._tcp.\fR". The service type must be an
underscore that is followed by 1 to 14 characters that can be letters, digits,
or hyphens. The transport protocol must be \fB_tcp\fR or \fB_udp\fR. New
service types should be registered at
http://www.dns-sd.org/ServiceTypes.html\&. The \fIdomain\fR parameter specifies
the domain on which a service is advertised. Most applications leave the
\fIdomain\fR parameter \fINULL\fR to register the service in default domains.
The \fIhost\fR parameter specifies the \fBSRV\fR target host name. Most
applications do not specify the host parameter value. Instead, the default host
name of the machine is used. The port value on which the service accepts
connections must be passed in network byte order. A value of \fB0\fR for a port
is passed to register \fIplaceholder\fR services. Placeholder services are not
found when browsing, but other clients cannot register with the same name as
the placeholder service.
.sp
.LP
The \fItxtLen\fR parameter specifies the length of the passed \fItxtRecord\fR
in bytes. The value must be zero if the \fItxtRecord\fR passed is \fINULL\fR.
The \fItxtRecord\fR points to the \fBTXT\fR record rdata. A non-\fINULL\fR
\fItxtRecord\fR must be a properly formatted \fBDNS\fR\fBTXT\fR record. For
more details see the \fBDNSServiceRegister\fR call defined in
\fB<dns_sd.h>\fR\&. The callback argument points to a function to be called
when registration completes or when the call asynchronously fails. The client
can pass \fINULL\fR for the callback and not be notified of the registration
results or asynchronous errors. The client may not pass the \fBNoAutoRename\fR
flag if the callback is \fINULL\fR. The client can unregister the service at
any time via \fBDNSServiceRefDeallocate()\fR.
.sp
.LP
The callback function argument \fIsdRef\fR is initialized by
\fBDNSServiceRegister()\fR. The \fIflags\fR argument in the callback function
is currently unused and reserved for future use. The error code returned to the
callback is \fBkDNSServiceErr_NoError\fR on success. Otherwise, an error code
defined in \fB<dns_sd.h>\fR is returned to indicate an error condition such as
a name conflict in \fBkDNSServiceFlagsNoAutoRename\fR mode. The \fIname\fR
argument holds the registered service name and the \fIregtype\fR argument is
the registered service type passed to \fBDNSServiceRegister()\fR. The domain
argument returned in the callback indicates the domain on which the service was
registered.
.SH RETURN VALUES
.sp
.LP
The \fBDNSServiceRegister\fR function returns \fBkDNSServiceErr_NoError\fR on
success. Otherwise, an error code defined in \fB<dns_sd.h>\fR is returned. Upon
registration, any subsequent asynchronous errors are delivered to the callback.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for description of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
Interface Stability	Committed
_
MT-Level	Safe
.TE

.SH SEE ALSO
.sp
.LP
\fBDNSServiceRefDeallocate\fR(3DNS_SD), \fBattributes\fR(7)
